remoting/host/me2me_desktop_environment.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "remoting/host/me2me_desktop_environment.h"
   6
   7 #include "base/logging.h"
   8 #include "base/single_thread_task_runner.h"
   9 #include "remoting/base/logging.h"
  10 #include "remoting/host/client_session_control.h"
  11 #include "remoting/host/curtain_mode.h"
  12 #include "remoting/host/desktop_resizer.h"
  13 #include "remoting/host/gnubby_auth_handler.h"
  14 #include "remoting/host/host_window.h"
  15 #include "remoting/host/host_window.h"
  16 #include "remoting/host/host_window_proxy.h"
  17 #include "remoting/host/local_input_monitor.h"
  18 #include "remoting/host/resizing_host_observer.h"
  19 #include "remoting/host/screen_controls.h"
  20 #include "third_party/webrtc/modules/desktop_capture/desktop_capture_options.h"
  21 #include "third_party/webrtc/modules/desktop_capture/screen_capturer.h"
  22
  23 #if defined(OS_POSIX)
  24 #include <sys/types.h>
  25 #include <unistd.h>
  26 #endif  // defined(OS_POSIX)
  27
  28 const char kRateLimitResizeRequests[] = "rateLimitResizeRequests";
  29
  30 namespace remoting {
  31
  32 Me2MeDesktopEnvironment::~Me2MeDesktopEnvironment() {
  33   DCHECK(caller_task_runner()->BelongsToCurrentThread());
  34 }
  35
  36 scoped_ptr<ScreenControls> Me2MeDesktopEnvironment::CreateScreenControls() {
  37   DCHECK(caller_task_runner()->BelongsToCurrentThread());
  38
  39   return scoped_ptr<ScreenControls>(
  40       new ResizingHostObserver(DesktopResizer::Create()));
  41 }
  42
  43 std::string Me2MeDesktopEnvironment::GetCapabilities() const {
  44   return kRateLimitResizeRequests;
  45 }
  46
  47 Me2MeDesktopEnvironment::Me2MeDesktopEnvironment(
  48     scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
  49     scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
  50     scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner)
  51     : BasicDesktopEnvironment(caller_task_runner,
  52                               input_task_runner,
  53                               ui_task_runner),
  54       gnubby_auth_enabled_(false) {
  55   DCHECK(caller_task_runner->BelongsToCurrentThread());
  56   desktop_capture_options()->set_use_update_notifications(true);
  57 }
  58
  59 scoped_ptr<GnubbyAuthHandler> Me2MeDesktopEnvironment::CreateGnubbyAuthHandler(
  60     protocol::ClientStub* client_stub) {
  61   DCHECK(caller_task_runner()->BelongsToCurrentThread());
  62
  63   if (gnubby_auth_enabled_)
  64     return scoped_ptr<GnubbyAuthHandler>(
  65         GnubbyAuthHandler::Create(client_stub));
  66
  67   HOST_LOG << "gnubby auth is not enabled";
  68   return scoped_ptr<GnubbyAuthHandler>();
  69 }
  70
  71 bool Me2MeDesktopEnvironment::InitializeSecurity(
  72     base::WeakPtr<ClientSessionControl> client_session_control,
  73     bool curtain_enabled) {
  74   DCHECK(caller_task_runner()->BelongsToCurrentThread());
  75
  76   // Detach the session from the local console if the caller requested.
  77   if (curtain_enabled) {
  78     curtain_ = CurtainMode::Create(caller_task_runner(),
  79                                    ui_task_runner(),
  80                                    client_session_control);
  81     bool active = curtain_->Activate();
  82     if (!active)
  83       LOG(ERROR) << "Failed to activate the curtain mode.";
  84     return active;
  85   }
  86
  87   // Otherwise, if the session is shared with the local user start monitoring
  88   // the local input and create the in-session UI.
  89
  90 #if defined(OS_LINUX)
  91   bool want_user_interface = false;
  92 #elif defined(OS_MACOSX)
  93   // Don't try to display any UI on top of the system's login screen as this
  94   // is rejected by the Window Server on OS X 10.7.4, and prevents the
  95   // capturer from working (http://crbug.com/140984).
  96
  97   // TODO(lambroslambrou): Use a better technique of detecting whether we're
  98   // running in the LoginWindow context, and refactor this into a separate
  99   // function to be used here and in CurtainMode::ActivateCurtain().
 100   bool want_user_interface = getuid() != 0;
 101 #elif defined(OS_WIN)
 102   bool want_user_interface = true;
 103 #endif  // defined(OS_WIN)
 104
 105   // Create the disconnect window.
 106   if (want_user_interface) {
 107     // Create the local input monitor.
 108     local_input_monitor_ = LocalInputMonitor::Create(caller_task_runner(),
 109                                                      input_task_runner(),
 110                                                      ui_task_runner(),
 111                                                      client_session_control);
 112
 113     disconnect_window_ = HostWindow::CreateDisconnectWindow();
 114     disconnect_window_.reset(new HostWindowProxy(
 115         caller_task_runner(),
 116         ui_task_runner(),
 117         disconnect_window_.Pass()));
 118     disconnect_window_->Start(client_session_control);
 119   }
 120
 121   return true;
 122 }
 123
 124 void Me2MeDesktopEnvironment::SetEnableGnubbyAuth(bool gnubby_auth_enabled) {
 125   gnubby_auth_enabled_ = gnubby_auth_enabled;
 126 }
 127
 128 Me2MeDesktopEnvironmentFactory::Me2MeDesktopEnvironmentFactory(
 129     scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
 130     scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
 131     scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner)
 132     : BasicDesktopEnvironmentFactory(caller_task_runner,
 133                                      input_task_runner,
 134                                      ui_task_runner),
 135       curtain_enabled_(false) {
 136 }
 137
 138 Me2MeDesktopEnvironmentFactory::~Me2MeDesktopEnvironmentFactory() {
 139 }
 140
 141 scoped_ptr<DesktopEnvironment> Me2MeDesktopEnvironmentFactory::Create(
 142     base::WeakPtr<ClientSessionControl> client_session_control) {
 143   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 144
 145   scoped_ptr<Me2MeDesktopEnvironment> desktop_environment(
 146       new Me2MeDesktopEnvironment(caller_task_runner(),
 147                                   input_task_runner(),
 148                                   ui_task_runner()));
 149   if (!desktop_environment->InitializeSecurity(client_session_control,
 150                                                curtain_enabled_)) {
 151     return scoped_ptr<DesktopEnvironment>();
 152   }
 153   desktop_environment->SetEnableGnubbyAuth(gnubby_auth_enabled_);
 154
 155   return desktop_environment.PassAs<DesktopEnvironment>();
 156 }
 157
 158 void Me2MeDesktopEnvironmentFactory::SetEnableCurtaining(bool enable) {
 159   DCHECK(caller_task_runner()->BelongsToCurrentThread());
 160
 161   curtain_enabled_ = enable;
 162 }
 163
 164 void Me2MeDesktopEnvironmentFactory::SetEnableGnubbyAuth(
 165     bool gnubby_auth_enabled) {
 166   gnubby_auth_enabled_ = gnubby_auth_enabled;
 167 }
 168
 169 }  // namespace remoting